Research of Fiber Laser Cladding Technology on Shaft-Parts

2012 ◽  
Vol 217-219 ◽  
pp. 2238-2241 ◽  
Author(s):  
Hong Bin Miao ◽  
Wen Qiang Zhao
Keyword(s):  
Wear Resistance ◽  
Service Life ◽  
Fiber Laser ◽  
Laser Cladding ◽  
Failure Surface ◽  
Wear Resistant ◽  
Repair Technology ◽  
Laser Equipment ◽  
Hydraulic Prop ◽  
Resistant Layer

The principle and features of laser cladding technology was described, and the fiber laser equipment was introduced. Coat an alloy wear-resistant layer on the failure surface of mine hydraulic prop, motor rotor, shovel drum and other shaft-parts by using fiber laser cladding technology, and take mine hydraulic prop as an example to introduce the steps of the fiber laser cladding. The results show that the fiber laser cladding repair technology can significantly improve the quality, hardness, wear resistance, service life of shaft-parts surface.

scholarly journals Self-Grinding Silage Knife Strengthened with Ni–WC Alloy Prepared by Laser Cladding

2021 ◽  
Vol 11 (21) ◽  
pp. 10236
Author(s):  
Lingfeng Xu ◽  
Zhanhua Song ◽  
Mingxiang Li ◽  
Fade Li ◽  
Jing Guo ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Service Life ◽  
Impact Toughness ◽  
Laser Cladding ◽  
Cutting Tools ◽  
Field Tests ◽  
Working Environment ◽  
Wear Resistant ◽  
Dense Microstructure ◽  
The Impact

The working environment of agricultural cutting tools is poor, and the operational quality and efficiency are reduced after they become blunt. This study aimed to develop a high wear-resistant agriculture knife with a long life. A Ni–WC alloy, wear-resistant layer was prepared using laser cladding technology on one side of the cutting edge of a 65 Mn silage knife. A self-grinding edge was formed when the cladded knife was used, which improved the cutting quality and service life of the knife. The microstructure, phase, composition, and hardness distribution of the cladding layer were detected and analyzed. The impact toughness and wear resistance of the laser-cladded samples were analyzed, and the cladded knife was tested in the field. The results show that a cladded layer with a dense microstructure formed metallurgical bonds with the substrate. The microhardness was uniform across the cladded layer, and the average hardness of the micro Vickers was approximately 1000 HV(0.2), which was approximately three times the hardness of the substrate. The impact toughness and wear resistance of the coated knife were obviously higher than those of uncoated knives. The field tests showed that compared with a conventional 65 Mn knife, the self-grinding knife with laser cladding could maintain its sharp cutting shape after operation for 76 h, which greatly extended the service life of the knife. This study improved the service life of an agricultural cutting tool, which enhanced the cutting performance and efficiency at the same time.

Microstructure and Grain Abrasion Properties of Cr3C2-NiCr Coating Prepared by Laser Cladding Method

2012 ◽  
Vol 271-272 ◽  
pp. 3-7
Author(s):  
Long Wei ◽  
Zong De Liu ◽  
Xin Zhi Li ◽  
Ming Ming Yuan ◽  
Cheng Yuan Zhong
Keyword(s):  
Wear Resistance ◽  
Wear Rate ◽  
Laser Cladding ◽  
Micro Hardness ◽  
High Quality ◽  
Wear Resistant ◽  
Hardness Tester ◽  
Technology Analysis ◽  
Main Component

Cr3C2-NiCr has high quality of wear resistant properties and is widely used in abrasive environment. In this paper, Cr3C2-NiCr coating was prepared on 45 steel by laser cladding technology. Analysis and research of the coatings were achieved by SEM and XRD to determine the main component and the different region on coatings. The hardness and the element component were investigated by micro-hardness tester and EDS. Abrasion tests were performed to contrast the wear resistance of two materials. The results indicate that the hardness of the coatings is nearly 3 times as the substrate. The coatings are well combined with the substrate and the phase of Cr3C2 has a large proportion in the coatings. Abrasion tests show that the average of wear rate on substrate is 5.2 times as the coatings.

The Microstructure and Wear-Resistant Properties of Laser Cladding Ni-Based WC Alloy on Q345 Steel Surface

2014 ◽  
Vol 556-562 ◽  
pp. 189-192 ◽  
Author(s):  
Shun Min Zhu ◽  
Ya Dong Zhang
Keyword(s):  
Wear Resistance ◽  
Grain Refinement ◽  
Laser Cladding ◽  
Steel Surface ◽  
Surface Hardness ◽  
Wear Resistant ◽  
Cladding Layer

With the laser cladding technology, 70%Ni60A+30%WC cladding layer was cladded on the surface of Q345 steel. And the phase, microstructure and wear resistance of cladding layer were analyzed. Experiments show that the Ni-based WC alloy laser cladding treatment on Q345 steel surface have a great upgrade on grain refinement, surface hardness and wear-resistance of Q345 steel surface.

scholarly journals THE INFLUENCE OF TECHNOLOGICAL PARAMETERS OF LASER SURFACING ON THE PROPERTIES OF NiCrBSiC-WC COMPOSITES

2018 ◽  
Vol 13 (4) ◽  
pp. 58-66
Author(s):  
A. E. Zatoka ◽  
D. V. Drobot ◽  
S. P. Merchev ◽  
S. V. Nevezhin ◽  
A. S. Gerasimov ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Service Life ◽  
Tungsten Carbide ◽  
Laser Cladding ◽  
Composite Coatings ◽  
Tungsten Carbides ◽  
Technological Parameters ◽  
Carbide Composite ◽  
Measurement While Drilling ◽  
Mechanical And Service Properties

It was investigated the influence of technological parameters of laser cladding on the thickness of the carbide composite coatings with similar composition and properties of matrix and different types of reinforcing inclusions (spherical tungsten carbides (WC) and recycled carbides). Special attention is paid to physical-mechanical and service properties of the composites such as hardness and resistance to abrasive wear. It is established that the thickness of the carbide composite coatings increases with increasing laser power and flow rate of the carrier gas, and with decreasing speed of the laser and the step of cladding. The study showed that at the addition of 50 wt.% WC matrix has smaller hardness values 540-560 HV, which allows to obtain the structure of the carbide composite coatings without cracks. At the same time, at addition of 80 wt.% WC matrix has higher hardness 670 HV, which does not provide the structure without cracks. Resistance of composites NiCrBSiC-WC to cracking, as well as their wear resistance, increases with increasing content of tungsten carbide. The wear resistance of the coatings received from powder Technicord 655-SL, with a reinforcement by recycled carbide, comparable to that for coatings from spherical tungsten carbide Tekmat WC-125. Coatings NiCrBSiCWC, obtained by laser cladding, are used to increase the service life of the equipment telemetering systems, in particular, it is possible to prevent of abrasion and provide of increasing the service life of the contact pads of the equipment for measurement while drilling.

Microstructure evolution and properties of a laser cladded Ni-Based WC reinforced composite coating

2020 ◽  
Vol 62 (11) ◽  
pp. 1078-1084
Author(s):  
Dang Kaifang ◽  
Jiang Zhiqiang
Keyword(s):  
Wear Resistance ◽  
Fiber Laser ◽  
Dilution Rate ◽  
Composite Coating ◽  
Laser Cladding ◽  
Mass Fraction ◽  
X Ray Diffraction ◽  
Cladding Layer ◽  
Reinforced Composite ◽  
Average Hardness

Abstract Laser cladding Ni-based WC reinforced composite coating was fabricated on the surface of Q235 steel using 6 KW fiber laser. The morphology, composition, microhardness and wear resistance of the composite coating at varied contents of WC particles were studied using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), microhardness tester and a wear tester. The results show that the dilution rate of the cladding layer decreases first and then increases with an increase of WC content. When the WC content is 20 wt.-%, the dilution rate is the smallest. In the process of fiber laser cladding Ni-based WC reinforced composite coating, WC particles partially dissolve and interact with other elements to form eutectics, which exist as lumpy shapes, strips and as spherical shapes. By increasing the WC content, the structure of the cladding layer appears to be refined. The main phases of the laser cladding layer are γ-Ni, M7C3, M23C6, CrB, WC and W2C. As the WC content increases, the hardness of the cladding layer increases. When the WC mass fraction reaches 40 wt.-%, the average hardness of the composite coating can be more than five times the substrate. When the mass fraction of WC is 20 wt.-%, the wear resistance of the cladding layer is best, which is more than three times that of Ni60A coating.

Progress of Laser Cladding Wear Resistant Coating on Titanium Alloy Surface: A Review

2021 ◽  
Vol 1035 ◽  
pp. 521-527
Author(s):  
Wen Wen Song ◽  
Chun Feng ◽  
Li Juan Zhu ◽  
Fang Fang Zhang
Keyword(s):  
Wear Resistance ◽  
Titanium Alloy ◽  
Laser Cladding ◽  
Alloy Powder ◽  
Great Influence ◽  
Surface Hardness ◽  
Wear Resistant Coating ◽  
Powder Materials ◽  
Wear Resistant ◽  
Resistant Coating

Laser cladding is an effective way to improve the surface hardness and wear resistance of titanium alloy. The powder materials and laser cladding process parameters have great influence on the properties of the wear resistant coating. In order to reduce the common defects including the cracks and pores of the coating, titanium alloy powder and self-melting alloy powder are selected to ensure the good adhesion between titanium alloy and wear resistant coating. In addition, the strengthening phase and self-lubricating phase were added to the laser cladding powder material to improve the micro hardness and reduce the friction coefficient, which bring in the improvement of the wear resistance of the coating. In the present work, the selection principle and application effect of powder materials for wear-resistant coatings are reviewed. the research status of the influence of laser technological parameters on coating properties is discussed. Meanwhile, the methods to reduce the defect of wear resistance coating by laser cladding are proposed.

scholarly journals Enhancement of wear resistance of mulcher teeth with the help of electrochemical coats

2020 ◽  
Vol 193 ◽  
pp. 01019
Author(s):  
N. M. Belous ◽  
Yu. E. Kisel ◽  
G. V. Guryanov ◽  
L. M. Markaryants
Keyword(s):  
Wear Resistance ◽  
Service Life ◽  
Abrasive Wear ◽  
Adhesive Strength ◽  
Wear Resistant ◽  
Alloying Additives ◽  
Enhance Wear Resistance

Influence of alloying additives in electrolyte and conditions of electrolysis on microhardness, adhesive strength and wear resistance of iron and cobalt coats have been investigated. Conditions of creating coats which make it possible to considerably enhance wear resistance of the mulcher teeth under the conditions of abrasive wear have been established. The process of creating wear resistant coats have been approved and recommended to introduction after the service life of the mulcher teeth sets have been extended.

WC Particles Reinforced Co-Based Alloy Coatings Produced by Laser Cladding

2016 ◽  
Vol 849 ◽  
pp. 695-701 ◽  
Author(s):  
Jia Zi Zhang ◽  
Guang Yuan Wang ◽  
Yuan Qin ◽  
Sen Yang
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Service Life ◽  
Laser Cladding ◽  
Microstructure Evolution ◽  
Composite Coatings ◽  
Alloy Composite ◽  
Die Steel ◽  
Cladding Layer ◽  
And Performance

To extend the service life of hot die steel (H13), WC particles reinforced Co-based alloy composite coatings were produced by laser cladding. The microstructure evolution and performance of the cladding layer were investigated. The experiment results showed that there existed fine dendritic crystals and dispersive WC particles in the cladding layer. The coatings were mainly composed of γ-Co, WC and Co3W3C phases. The microhardness of the cladding layer was higher than that of the arc surfacing layer, and the microhardness gradually increased with WC content. Compared to the substrate, the friction coefficient of the cladding layer reduced greatly. The coatings with 15wt.% WC possess the best wear resistance.

Experimental Study on Improving Abrasion Resistance of Sizing Crusher Tooth

2010 ◽  
Vol 150-151 ◽  
pp. 1311-1314
Author(s):  
Yong Tai Pan ◽  
Yong Zhi Li
Keyword(s):  
Experimental Study ◽  
Wear Resistance ◽  
Service Life ◽  
Working Conditions ◽  
Abrasion Resistance ◽  
System Analysis ◽  
Average Life ◽  
Wear Resistant ◽  
Coal Classification ◽  
The Subject

The shorter service life of sizing crusher tooth is a difficult technology problem. At present the coal classification used in crushing machine, due to poor working conditions, despite the use of wear resistant surfacing electrode to improve the wear resistance of broken teeth, broken teeth, but not to the average life of six months, the subject of study was significantly improve the life of the crusher tooth. To improve the service life of sizing crusher tooth, some research has been done, through system analysis and test some result can be concluded.

SWEBOR 400

Alloy Digest ◽  
2014 ◽  
Vol 63 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Tensile Properties ◽  
High Strength Steel ◽  
High Strength ◽  
Bend Strength ◽  
Great Strength ◽  
Wear Resistant

Abstract Swebor 400 (hardness 400 HBW) is a high-strength steel with good wear resistant qualities. This alloy is used to endure conditions of extra-heavy wear and when great strength and good weldability is required. This datasheet provides information on composition, hardness, tensile properties, and bend strength as well as fracture toughness. It also includes information on wear resistance as well as forming, machining, and joining. Filing Code: CS-181. Producer or source: Swebor Stål Svenska AB.

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